# JsMediaSDK\_Instance is not defined

**URL:** <https://devforum.zoom.us/t/jsmediasdk-instance-is-not-defined/38080>\
**Category:** Web\
**Created:** [December 10, 2020, 7:49am UTC](https://devforum.zoom.us/t/jsmediasdk-instance-is-not-defined/38080 "2020-12-10T07:49:13Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![MaxM](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/maxm/32/42303_2.png) [@MaxM](https://devforum.zoom.us/u/MaxM)\
**Post date:** [December 10, 2020, 11:03pm UTC](https://devforum.zoom.us/t/jsmediasdk-instance-is-not-defined/38080/2 "2020-12-10T23:03:48Z")

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Hey @imsumi8,

Thank you for reaching out to the Zoom Developer Forum. Looking at historical forum posts, it looks like this is related to an issue with the Web SDK Recaptcha feature. While we used to have a form to opt-out of this feature, as of version 1.8.0, the ReCaptcha is disabled by default. I recommend testing with an updated version of the SDK to see if that resolves your issue.

> [@ReferenceError: JsMediaSDK\_Instance is not defined](https://devforum.zoom.us/t/referenceerror-jsmediasdk-instance-is-not-defined/23467/3):
>
> I dont hace a percentage, is not even consistent. Happens sometimes and after clearing cache it may stop appearing, but sometimes it doesnt. It happens on calling init. Probably is already fixed in 1.7.9, but I cant test with it right now because of captcha.

Let me know if you have any questions.

Thanks,  
Max

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